Preparation and properties of yttria-stabilized tetragonal phase zirconia nano-ceramics by high gravity

• Published in: Applied physics. A, Materials science & processing Vol. 129; no. 7
• Main Authors: Liang, Ya-Lu, Yuan, Zhi-Guo, Ma, Yao, Duan, Qing-Qing, Li, Yu-Long
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.07.2023; Springer Nature B.V
• Subjects: Aluminum oxide; Applied physics; Ceramics; Characterization and Evaluation of Materials; Chemical precipitation; Condensed Matter Physics; Doping; Impact velocity; Machines; Manufacturing; Materials science; Mechanical properties; Nanotechnology; Optical and Electronic Materials; Packed beds; Particle size; Physics; Physics and Astronomy; Processes; Shock resistance; Sintering (powder metallurgy); Surfaces and Interfaces; Tetragonal zirconia polycrystals; Thermal resistance; Thermal shock; Thin Films; Yttria-stabilized zirconia; Yttrium oxide; Zirconium dioxide; Ceramic; Tetragonal phase zirconia; Coprecipitation; Impinging stream-rotating packed bed; Doping
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-023-06748-1

In this paper, yttria-stabilized tetragonal phase zirconia (Y-TZP) nanoceramics were prepared by the high gravity co-precipitation method for the mechanical properties as well as low strength of zirconia ceramics. The precipitation reaction was first performed in an impinging stream-rotating packed bed (IS-RPB), subsequently, Al 3+ -doped Y-TZP (Y-TZP/ Al 2 O 3 ) was prepared by calcination. Results showed that when the doping concentration of Al 3+ was 3%, its particle size was the smallest among other doping concentrations, and the Y-TZP/Al 2 O 3 was tetragonal. When the IS-RPB reactor was used, the average particle size of Y-TZP/Al 2 O 3 was obtained with a high gravity factor of 125.08 and an initial impact velocity of 17.5 m/s was 14 nm. Compared with the Y-TZP powder obtained from the stirring reactor, the particle size was smaller and more uniformly distributed. The Y-TZP nanoceramics obtained by pressing and sintering the powder prepared by IS-RPB had high shrinkage and low porosity. As a result, the Y-TZP/Al 2 O 3 ceramics prepared by IS-RPB have good thermal shock resistance, and this way of processing can be used as an industrially scalable route for preparing Y-TZP nanoceramics. Thus, the preparation of nanopowders using IS-RPB has good prospects for application. Graphical abstract